Как решить данную дробь?

(a-5)/(5a+25)+(3a+5)/(a²+5a)=

(a-5)/5(a+5)+(3a+5)/(a(a+5))=

(a(a-5)+5(3a+5)/(5a(a+5))=

(a²-5a+15a+25)/(5a(a+5))=

(a²+10a+25)/(5a(a+5))=

=(a+5)²/(5a(a+5))=(a+5)/(5a)